The TissueScan Lung Cancer Tissue qPCR Array (Panel II, III and V) (OriGene Technologies, Inc.,) was analyzed the level of MCT-1 mRNA expressed in human lung carcinomas, in which the MCT-1 mRNA revealed a 2-fold induction over the mean of normal lung tissue were recognized as high expression of MCT-1 gene. The gene discussed is MCTS1; the disease is lung cancer.